Swaging tool



Nov. 25 lg 11,517,079

\ G. H. LANGTON SWAGING TOOL Filed Feb. 2:5. 1923 Patented Nov. 25, 1924i..

SWAGJNG TOOL.

Application filed February 23, 1923. Serial No. 620,808.

To all whom t may concern:

Be it known that I, Gnocca I'I. LANGTON, citizen of the United States, residing yat Princeton, in the county of Mercer and State of Ill/Test Virginia, have invented certain Vnew and useful Improvements in Swaging Tools, of which the following is a specification. i

This invention relates to an improved bolt and rivet head swaging tool.

It sometimes happens, in the operation of a locomotive, that the water in the boiler is allowed to reach such a low level that the heads of the stay bolts of the crown sheet are drawn, by the heat in the fireboir, away from said sheet with the result that leakage occurs around the bolts. yThis condition must, of course, be immediately corrected and, under present practice, the procedure not uncommonly followedV is to manually mash or spread the head of each stay bolt by pounding thereon with a punch or the like until the periphcra-linargins of the bolt heads are swaged back into tight engage nient with the sheet to form sealed joints between the bolt heads and the sheet. However, it very often happens that the necessary pounding against a bolt head serves to loosen the bolt in the crown sheet with the result that even though the margin of the head of the bolt is swaged into engagement with the sheet, leakage will, nevertheless, occur. The present invention, therefore, seeks to provide a tool which will overcome these difficulties and a tool which may be power driven for swaging the bolt heads into engagement with the sheet, thus not only effecting a better joint than heretofore between the bolt heads and the sheet but also accomplishing the work with rapidity.

In the drawings: Figure 1 is an elevation showing my improved tool vin use, parts being broken away and illustrated in section;

Figure 2 is a top plan view of the tool, and

Figure 3 is a detail view showing a bolt head after being operated upon by the tool.

In carrying the invention into effect, I employ a substantially henri-spherical head 10 from which extends a longitudinally tapered shank ,ll flattened at its outer end for engagement'in the chuck of a suitable motor adapted to rotate the tool. The head 10 is provided with a central cylindrical recess 12 from the bottom of which leads a plurality of. discharge passages 13 and, as will be observed, said recess is flared at. its upper end to define a beveled face 14. Opening through said face into the recess is a plurality of radial slots 15 spaced at equi-distant .points oircumferentially of the head. As brought out in Figure 1, these slots are tilted with respect to the axis of the recess and inclined from their outer ends toward their inner ends toward the mouth of the recess, the slots opening through the periphery of the head. Freely mounted in the slots are truste-conical rollers 16 which may be inserted in the slots at the outer ends thereofand journaling said rollers are cap screws 17 threaded into the head, the head being recessed to countersink the heads of said screws. Thus, the rollers may, should occasion demand, be readily renewed, and it is now to be noted that the larger ends of the rollers are presented toward the outer-end of the recess 12 and project into said recess at the inner ends of the slots 15, the rollers being tilted. with respect to the axis of the recess in conformity with the inclination of said slots. In the present instance, I have shown the head as provided Vwith three of the slots 15 and, accordingly, with three of said rollers. However, the number of slots and rollers may, of course, be varied as found most eX pedient in the practical use of the tool.

In Figure 1 of the drawings, I have illustrated the manner in which the tool is employed to operate upon the head of a con ventional locomotive boiler crown sheet stay bolt. The crown sheet is indicated at 18 and threaded through the sheet is the stay bolt 19 which is provided with the usual head 2() having a bell shaped base portion 21 which, under ordinary conditions, bears tightly against the sheet to form a sealed joint between the sheet and the bolt. However, this gure of the drawings illustrates the manner in which the base of the head is drawn away from the sheet by the heat in the fireboX when the water level in the boiler is allowed to get too low, and the object sought is, after the joint is thus broken between the smaller.v ends thereof.

bolt head' and the crown sheet, to swage the head back into tight engagement with the sheet. To accomplish this result the tool is placed upon asuitable motor capable of rotatingthe tool, when the head ofthe tool is, as shown in Figure l,v fitted over the head of the bolt to engage the rollers 16 with the base portion Qi of the'bolt, the bolthead being received in the recess l2. As will be seen7 the rollers serve to center the tool with respect to the bolt head and since the rollers arc tilted with respect to the axis of said recess, the rollers will engage the base por tion ofthe bolt the bascdeiids of the rollers `only,' thetaper of the rollers providing clearance between the rollers and the head ofthe bolt from the base ends 'of the rollers to the i The tool is then rotated'janvd, at the saine time, fed or advanced against' the head of the bolt with the resultthat.v tihei rollers will be car-.sed to swagel the margin ofthe base of the bolt radially out* ward, as shownin ire 3, to define an encircling flange,y indicatedl ai: 22T which will be@ coincidently forcer evenly against the sheet to again form a sealedv joint between the Ybolt head. andthe sheet. As will be appreciated@ the Yheads of the numerous stay bolts fof" the crown sheet of a locomotive yboiler may, by the' use ofI my in'iprcved tool,

be readily swaged with a correspondingsaving of time and labor and without loosening ofthe bolts.

Having thus described the invention, what is claimed as new is:

l. A swaging tool including a head provided at its forward end with an axial socket, and a plurality of tapered swaging rollers mounted upon the head outside of the periphery of said socket but projecting at their larger ends into the socket near thc forward end thereof, thc rollers having their axes converging in the direction of the inner endof the socket and having their smaller ends disposed outside of the periphery of the socket.

2. A swaging tool' including a head provided at its forward end with an axial socket and formed in spaced relation to the forward end. thereof with a plurality of spaced radial slots inclined toward their outer ends away fromv the forward end of the head, and a plurality of frusto-conical swaging rollers journaled in said slots to inoje'ct at their'larger ends into said socket, the rollers having their axes lying at an acute angleV to the axis of the socket to converge toward the inner end of the socket and i having their sn'ialler ends disposed outside of the'periphery of the socket.

ln testimony whereof I aiiix my signature.

GEORGE. H. LANGTON. [Th sl lill 

